when all the talk is of how to avoid the comp instead of improving the comp, then it's no surprise when it doesn't do very well.
But realistically, how can a parent have enough clout to improve their local comp? We, as parents, make the decisions we think right for OUR own children. Changing "everyone's" education is only something we can do via the ballot box, but there's barely been any difference between political parties as regards education. I'm not deluded enough to think that sending my kid to a failing comp will make a blind bit of difference to the school or the other kids - maybe if hundreds did it, then yes eventually, but one lone voice in the wilderness - not a chance!
Personally, I would like a ban on ALL forms of selection and stop the ridiculous situation of kids travelling miles to their choice of school, and have "choice" restricted to your nearest 2/3 comps. Yes, a ban on the 11+, but only alongside a ban on Faith school selection and ALL other forms of selection, such as sports, arts, languages, etc. Then all comps would be on a level playing field and would reflect their relatively small geographic area. As I've said many times, in our area, the two HUGE faith schools are out of all proportion and between them have a far greater impact on the other comps than our relatively small grammar school - together they're four time bigger than the grammar, yet parents moan that it's the grammar that sucks the good kids away from the failing comps - the same parents who lie and cheat their way to get a decent comp education for their kids.